Automatically-threading loom shuttle



May 19, 1925. 1,538,639 P. KAVANAGH AUTOMATICALLY THREADING LOOM SHUTTLEFiled Oct. 2, 924 I ln ml 3 3 15 I: WW a W1 mural W I f/V TORI QM mmATTOkA EY Patented May 19, 1925.

UNITED stares PATENT-OFFICE.

PATRICK KAVANAGI-I, OF MILFORD, MASSACHUSETTS, ASSIGNOR .TD 'DRAPER COR-PORATION, OF HOPEDALE, jMAS'SAC-HUSETTS, A UORPOR-A'TION OiF MAINE.

AUTOMATICALLY-THREADING LOOM SHUTTLE.

Application filed. October TonZZ whom "it may concern: H

Be it known that I, PATRICK KA ANAGH,

and State of "Massachusetts, have "invented an Improvement inAutomatically-Thread-- ingLoom Shuttles, of which the fOllOWlHg,description, in connection with the accompanying drawings, is aspecification, like characters on the drawings representing like parts.

This invention relates to automatically threading loom shuttles employedin looms wherein the weft or filling thread isautomatically replenishedfrom time to time.

It is now the common practice to provide automatically threading loomshuttles with various forms of horns or overhangs tor guards whichprevent the fre exit of the thread from the threading device when oncethe shuttle has been threaded, and in some cases the obstructing hornsor overhangs have been associated with scroll eyes to facilitate shuttlethreading and as an additional security against subsequent unthreading.v

During the operation of the 100m when the shuttle is arrested in thereplenishing box, the weft or filling thread is liable to overthrow orballoon sult that in th now prevailing forms of loom shuttles, the loopor overthrow liable'to become caught on some part of the threadingdevice and be broken .on-the subsequent pick. p

In the patent to Edward S. Stimpson, No. 1,483,492, dated February 12,1924, is shown and described an automatically threading loom shuttlewherein on the .oc-' curence of a loop or overthrow, the shuttle willbecome partially or wholly unthreaded, and will again become threaded onsubsequent picks of the shuttle. The present invention is a furtherdevelopment of the automatically threading shuttle shown and describedin the Stimpson patent, and is more. particularly directed to means forfacilitating the return of the weft or filling thread to the control ofthe threading device as the shuttle is picked after it has beenunthreaded or partially unthreaded. When the shuttle is wholly orpartially nnthreaded and is picked, the whirling action of the thread asit unwinds from the filling carrier or bobbin in the shuttle is in aUnited States, and a resi b condition is fully disclosed or loop, withthe re isv '2, 1924. Ser al No. 741,129.

of the threadon the filling carrier or bob-- in. Usua'lly'the fillingcarriers or'bobbins .have the filling wound thereon in .a directioncontra clockwise, viewing the bobbin or filling carrier from the tip endthereof, and when the filling is unwound during the flight of theshuttle, th unwinding thread takes a course clockwise of the fillingcarrier or bobbin at the tip end. This patent. In some cases, however,the filling is wound in the reverse direction upon the filling carrieror bobbin, that is, looking at the tip end of the filling carrier, thefilling is wound ina clockwise direction, so that when the fillingnnwindsas the shuttle @is picked, it will whirl in a contra-clockwisedirection.

One of the objects ofthepresent invention, therefore, is to provide anautomatically threading loom shuttle of the thread casting type, such asshown and described in th 'Stimpson patent, that it may be employed witha reversely or left-wound hobbin. Another object of the invention is toprovide in a shuttle of the thread casting type, such as disclosed inthe Stimpson patent, additional means cooperating with the whirlingthread as it is unwound from the bobbin when the shuttle is picked, toinsure that the whirling thread will pass into control of the threadcasting and guid= ing device. This latter feature may be advantageouslyutilized in shuttles using either the right or left-wound fillingcarriers or bobbins.

The invention and various new combinations of parts will best be madeclear from the following description and the accompanying drawings ofone good term thereof.

In the drawings: 7

Fig. l is a perspective view of an auto matically threading shuttle ofthe thread casting type having the present invention associatedtherewith, and shown as employed in connection with a reversely orleft-wound bobbin, part of the shuttle be ing broken away;

Fig. 2 is a perspective detached detail showing a threading blockcontaining the present invention;

Fig. 3 is an enlarged longitudinal section through the threading blockand thread direction reverse of the wind in the Stimpson for use inconnection with the usual rightwound bobbin.

The shuttle 1 is provided with the usual bobbin chamber 2 in which issupported the usual filling carrier or bobbin 3. The means fordetachably holding the filling carrier or bobbin in the shuttle, as byuse of the bobbin holding jaws, is not herein shown because it forms nopart of the present invention.

The shuttle 1 is provided with a threading block receiving chamber 4formed in the front end of the shuttle, and a frontwardly extendingrecess 5. Communicating with the longitudinally extending threadpassage. which is shown as formed in the threading block, the shuttle isprovided with a side delivery eye 6.

The threading block 7 has the side walls 8 and 9 formed to fit the sidewalls of the threading block receiving chamber 4, and at the side of thethreading block adjacent the side delivery eye 6 of the shuttle is thethread director 10, the tip end portion 11 of which is turned laterallywith a tapering end constructed and arranged to shed any loop or threadthat may be caught thereon, as more fully explained in the Stimpsonpatent hereinbefore referred to.

The threading block 7 has the longitudinally extending thread passage 12which is substantially unobstructed by any overhang, guard or similardevice which would interfere with the ready exit or entrance of thethread. i

As shown inv Fig. 1, the filling carrier or bobbin 3 has the filling 13wound thereon in a clockwise direction looking towards the tip of thefilling carrier or bobbin, and consequently as the weft or fillingthread a is drawn when the shuttle is picked, the filling thread takes acourse in a direction substantially as indicated by the arrow in Fig. 5.Mounted in the thread passage is the thread casting and guiding device14 which, as shown, extends from the side of the thread passage oppositethe side delivery eye 6 and thread director 11, with the result thatwhen the filling thread a is withdrawn from the bobbin as the shuttle ispicked, the course of the thread will correspond to the genfrom thefilling carrier or bobbin eral curve of the thread casting and guid ingdevice 14.

The thread casting and guiding device 14 has an upwardly, laterally andfrontwardly extending thread casting portion 15 which starts preferablyat a point adjacent the bobbin chamber, the construction being such thaton the formation of a loop or overthrow when the shuttle is arrested atthe end of its flight, the weft or filling thread (L will engage theupwardly, laterally and frontwardly extending edge 15 and be thrown fromthe thread casting device upwardly and. it may be, entirelylongitudinally extending thread passage.

As shown in the present instance of the invention, the thread castingand guiding device 14 has abase portion 16 which extends downwardly intothe receiving recess 17 of the threading block, and its lower edgeportion is preferably turned laterally, as at 18, to provide a firm andsteadying hearing at the under side of the threading block. lVith theconstruction described, the thread casting and guiding device 14 as wellas the threading block 7 may be advantageously and conveniently securedin the shuttle by the usual cross-bolt 19.

The thread casting and guiding device 14 is conveniently formed as ascroll, as shown, the frontwardly extending edge portion 20 of whichextends frontwardly in the thread passage, substantially as shown anddescribed in the Stimpson patent, hereinbefore mentioned, with theexception that the thread casting and guiding device when used with aleft-wound or reversely wound bobbin is located in the thread passage,so i that the thread casting portion 15 thereof starts at a point at theleft of the thread passage and extends upwardly, laterally andfrontwardly therefrom, to thereby cast the thread of the reversely orleft-wound bobbin when a loop or overthrow occurs as the shuttle isarrested at the end of its flight.

The threading block 7 has a bridge portion 21 over which the thread isdrawn when the shuttle is picked, and frontwardly of the bridge portion21 is a horn or deflector 22 below which the thread passes, as indicatedin Fig. 1', when the shuttle is fully threaded and the thread is beingdelivered from the side delivery eye.

As hereinbefore noted, thread 0, as it is drawn from the filling carrieror bobbin during the flight of the shuttle, whirls in apath determinedby the wind of the thread upon the filling carrier or bobbin, and animportant feature of the present invention, therefore, consists in aguide located in the thread passage for directing the thread threadcasting and guiding device as the wholly or partially unthreaded shuttleis picked.

out of the a the weft or filling lUO into the control of the -Where thefilling is wound upon a filling carrier or bobbin witha reverse wind, asindicated in Figs. 1' and 5, the whirling action of the thread carriesit in a path indicated by the arrow 7) and the radiating lines 0, Fig.The thread guide indicated at 23 extends from the side of the threadpassage preferably in a downwardly inclined direction, ig. 5, towadsthat side from which the thread casting and guiding device assumes itsinitial position. In the case of a reversely or left-wound bobbin, asindicated in F ig, 5, as the thread whirls in the direction of thearrowZ; 23 and be by it directed into control of the thread casting andguiding device, finally assuming the position as indicated at a, Fig. 5.l

In case the thread casting and guiding device is employed with a bobbinhaving the usual or right-hand wind, the guide 23 is locatedas indicatedin 6', that is, it ex tends downwardly in an inclined direction from theside of the thread passage towards the opposite side thereof to whichthe thread casting and guiding device is secured, so that in thewhirling action of the thread from the usual wound bobbin. the guide 23will direct the thread into control of the thread casting and guidingdevice.

When the thread casting and guiding de vice is employed in connectionwith a reversely or left-wound bobbin, as indicated in Fig. 1, thethread casting portion 15 starts from a point preferably adjacent thebobbin chamber in an upwardly, laterally and frontwardly extendingdirection from the left side of the thread passage, and the guide 28extends from the opposite side of the thread passage in an inclineddownwardly direction to direct the whirling thread into control of thethread casting and guiding device.

Where the thread casting and guiding device is employed in connectionwith a rightwound bobbin, as indicated in Fig. 6, it will be secured inthe thread passage with its thread casting portion 15 extendingupwardly, laterally and frontwardly from the right side of the threadpassage and the guide 23 will extend from the opposite side of thethread passage in a downwardly inclined direction, as indicated in Fig.6, the effect being that the guide 23 whether used with a right or leftwound bobbin will direct the thread more accurately into control of thethread casting and guidlng device as the wholly or partially unthreadedshuttle is picked.

hat is claimed is:

1. An automatically threading loom shuttle having a thread passageextending longitudinally thereof, a side deliver eye communicating withthe thread passage, a thread casting and guiding device in the it willstrike the guide thread passage constructed and. arranged tocast thethread and partially or wholly unthread the shuttle on the occurrence ofan overthrow as the shuttle is arrested at the end of its flight, and aguide between the thread casting and guiding device and the sidedelivery eye for directing the thread i thread passage constructed andarranged 'to cast the thread and partially or wholly unthread theshuttle on the occurrence of an overthrow as the shuttle is arrested atthe end of its flight, and a guide in the thread passage between theguidin device and the side deliver 7 e e for 6) I casting and directingthe whirling thread into the control of said device as the unthreadedshl-ittle is picked.

3; An automatically threading loom shut.- tle having the wood oftheshuttle cut away to form a threading block receiving chamber and ide'delivery eye, in combination with a threading block secured in said chanrber thread casting and guiding device secured at one side of thethreading block for casting the thread on the occurrence of a loop oroverthrow to partially or wholly unthread the shuttle, and a guide inthe thread passage at the opposite side thereof for directing thewhirling thread into'control of said device as the partially or whollyunthreaded shuttle is again picked.

4. An automatically threading loom shuttle having the wood of theshuttle cut away to form a threading block receiving chamber and sidedelivery eye, in combination with a threading block secured in saidchamber and having a thread passage, athread casting and guiding devicesecured at one side of the threading block and having a thread castingportion which extends upwardly, laterally and frontwardly from a pointadjacent the bobbin chamber for easting the thread from said device andpartially or wholly unthreading the shuttle on the occurrence of anoverthrow, and a guide in the thread passage at the opposite sidethereof for directing the whirling thread into the control of saiddevice as the partially or wholly unthreaded shuttle is again picked.

5. An automatically threading loom shuttle having a longitudinallyextending thread passage, a side delivery eye, a thread casting andguiding device in the thread passage having a thread casting portionextending upwardly, laterally, and frontwardly from the side of thethread passage opposite the and having-a thread passage, a

side delivery eye for casting the thread of a bobbin on the occurrenceof a loop or overthrow to partially or wholly unthread the shuttle asthe shuttle is arrested at the end of its flight and a guide in thethread passage at the side opposite the thread casting and guidingdevice for directing the whirlfrom the side of ing thread into thecontrol of said device.

6. An automatically threading loom shuttle having a longitudinallyextending thread passage, a side delivery eye, a thread casting andguiding device in the thread passage having a thread casting portionextending upwardly, laterally, and frontwardly the thread passageopposite the side delivery eye for casting the thread of a reverselywound bobbin to partially or wholly unthread the shuttle on theoccurrence of a loop or overthrow as the shuttle is arrested at the endof its flight.

7. An automatically threading loom shuttle having a longitudinallyextending thread passage, a side delivery eye, a thread casting andguiding device in the thread passage having a thread casting portionextend ing upwardly, laterally, and frontwardly from the left side ofthe thread passage for casting the thread of a left wound bobbin on theoccurrence of a loop or overthrow to partially or wholly unthread theshuttle as the shuttle is arrested at the end of its flight, and a guidebetween the thread casting and guiding device and the side delivery eyeto direct the whirling thread of the partially or wholly unthreadedshuttle into the control of said device as the shuttle is again picked.

8. An automatically threading loom shuttle having a threading blockprovided with a longitudinally extending thread passage with an open topfor ready entrance and exit of the thread, a side delivery eye, a threadcasting and guiding device having a thread casting portion adjacent thebobbin chamber at the side thereof opposite the delivery eye for castingthe thread of a re versely wound bobbin and partially or whollyunthreading the shuttle on the occurrence of a loop or overthrow whenthe shuttle is arrested at the end of its flight.

9. An automatically threading loom shuttle having a threading blockprovided with a longitudinally extending thread'passage and a threaddirector projecting from one side thereof, and a thread casting andguiding device having a thread casting portion ex tending from theopposite side thereof for casting the thread of a left wound bobbin andpartially or wholly .unthreading the shuttle on the occurrence of a loopor overthrow as the shuttle is arrested at the end of its flight.

In testimony whereof, I have signed my name to this specification.

PATRlCK KAVANAGH.

